package com.laoye.big_event.Interceptors;


import com.laoye.big_event.Utils.JwtUtil;
import com.laoye.big_event.Utils.ThreadLocalUtil;
import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.stereotype.Component;
import org.springframework.web.servlet.HandlerInterceptor;

import java.util.Map;

@Component
//登录拦截器
public class LoginInterceptor implements HandlerInterceptor{
    @Autowired
    private StringRedisTemplate redisTemplate;
    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) {
//        获取请求头
        String token = request.getHeader("Authorization");
        //验证Token
        try {
//            从redis中获取相同的token
            ValueOperations<String, String> redis = redisTemplate.opsForValue();
            String r = redis.get(token);
            if(r==null){
                throw new  RuntimeException();
            }
//            第二次验证token
            Map<String, Object> claims = JwtUtil.parseToken(token);
            //把业务数据存储到ThreadLocal中
            ThreadLocalUtil.set(claims);
            //放行
            return true;
        } catch (Exception e) {
            //设置状态码
            response.setStatus(401);
            //拦截
            return false;
        }
    }

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
//        用完后清空ThreadLocal中的数据
        ThreadLocalUtil.remove();
    }
}
